Malicious PDF — malware analysis report

Static analysis result for SHA-256 9be85cd2c0313595…

MALICIOUS

PDF

44.9 KB Created: 2021-06-09 13:22:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: e169049467c95c384f37ffd87db73f35 SHA-1: 1a822ab2b5ea1e759b35c5627989f04d23939c71 SHA-256: 9be85cd2c0313595ad939ade4fb460fdd37203dff058576f9ae9fe202278d7a7
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links to external resources, many of which appear to be SEO-optimized links for game cheats and hacks. The document body, though partially corrupted, mentions "Roblox Hack To Get Robux 2021" and includes a URL pointing to a similar exploit. The presence of a "clipboard command execution lure" heuristic suggests the document may attempt to trick users into executing commands, likely to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.tw/app/431946152/roblox-hack-to-get-robux-2021-game-hack PDF link annotation
    • http://digilib.iailm.ac.id/repository/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/free-spin-coin-master-instagram_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coin-master-hack-spin_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/how-to-hack-m-coins-mcpe-master_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-heaven-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/how-to-make-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coin-master-app_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/how-to-get-minecraft-for-free-on-ps4_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/free-robux-no-password_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/how-to-start-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-robux-easy-and-fast_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-unlimited-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/how-to-get-free-robux-on-roblox-android_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/tiktok-free-robux-hack_GM835599320.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coin-master-hack-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/roblox-character-free_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/pubg-uc-20210_GM1330123889.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005300.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5300 24664 bytes
SHA-256: 02cd553735c8a8e7e922f8dd0cc446f7122ad7f62ee6128d5df88de2af05d9d8
font_01_sfnt_off00008b32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B32 18828 bytes
SHA-256: 029af21926cfaee70a5ae1ee1ce61704488363427a1dc4af0e4d944853491389

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